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Related Experiment Video

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Comparing Eye-tracking Data of Children with High-functioning ASD, Comorbid ADHD, and of a Control Watching Social Videos
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Alexithymia: a general deficit of interoception.

Rebecca Brewer1, Richard Cook2, Geoffrey Bird3

  • 1MRC Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London SE5 8AF, UK; School of Psychology, University of East London, University Way, London E16 2RD.

Royal Society Open Science
|November 18, 2016
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Summary

Alexithymia involves difficulty recognizing emotions. This study shows alexithymia is linked to broader interoception problems, not just emotional signals, affecting both typical and clinical groups.

Keywords:
alexithymiaemotioninteroception

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Area of Science:

  • Psychology
  • Neuroscience
  • Clinical Psychology

Background:

  • Alexithymia is characterized by difficulties identifying and describing emotions.
  • Interoception, the interpretation of bodily signals, is crucial for emotional awareness.
  • Previous research suggested alexithymia's interoceptive deficit might be specific to emotions, but recent findings indicate broader issues.

Purpose of the Study:

  • To investigate if alexithymia is associated with selective affective interoception impairment or general interoceptive impairment.
  • To examine the relationship between alexithymia and non-affective interoceptive ability.
  • To assess perceived similarity between affective and non-affective states in individuals with and without alexithymia.

Main Methods:

  • Cross-sectional study comparing typical individuals (n=105) and individuals with psychiatric conditions (n=103).
  • Utilized questionnaires to measure alexithymia, self-reported non-affective interoceptive ability, and perceived similarity between affective and non-affective states.
  • Analyzed associations between alexithymia and interoceptive measures in both populations.

Main Results:

  • Alexithymia was significantly associated with poorer non-affective interoception across both typical and clinical groups.
  • Individuals with alexithymia reported increased perceived similarity between affective and non-affective bodily states.
  • Findings suggest a generalized interoceptive deficit in alexithymia.

Conclusions:

  • Alexithymia is better characterized by a general failure of interoception rather than a deficit specific to affective processing.
  • The findings have implications for understanding the neurobiological underpinnings of alexithymia.
  • Future research should explore the mechanisms behind this generalized interoceptive impairment.